Release 1.9.68.122

Clean up and rework of Yahoo Data. The data feeds seems to be reliable
again

IBStore Support for IND prices (simplfication of PR 373) with support to
disable it

It would seem that downloading from Yahoo is not full of quirks and column swaps anymore. The feed has been cleaned up, removing traces of the original API and making it clearer and with more parameters where possible. The README in the repositovy has also been updated to reflect this fact.